Resource Type
Serial/Series Title
Decade
3 Matching Results
Results open in a new window/tab.
Results:
1 - 3 of
3
The Eastern Front of the Bitterroot Range, Montana
From abstract: The origin of the gneissic rocks on the eastern border of the Idaho batholith in the Bitterroot Range, near Hamilton, Mont., has long been in dispute. Lindgren regarded these rocks as the product of stresses related to a normal fault along the front of the range with an eastward dip of about 150. He thought both the hanging wall and the footwall had moved, with a total displacement along the fault plane of at least 20,000 feet. The faulting was believed to have been so recent as to be a major factor in the present topography. Langton appears to accept the concept of faulting but to regard the gneissic rocks as formed much earlier from a granitic rock that was more silicic and older than the Idaho batholith.
Date:
1952
Creator:
Ross, Clyde P.
System:
The UNT Digital Library
Shorter Contributions to the Stratigraphy and Geochronology of Upper Cretaceous Rocks in the Western Interior of the United States
The following report presents measured sections and lithostratigraphic correlations of the units in the order to document a syntectonic unconformity in order to understand the tectonic history of the area.
Date:
1995
Creator:
Geological Survey (U.S.)
System:
The UNT Digital Library
Volcanic Activity in the Aleutian Arc
Including a list of all known volcanoes and a summary of activity betwen 1760 and 1948.
Date:
1950
Creator:
Coats, Robert R.
System:
The UNT Digital Library